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解析:For any positive integer n, n>1, th

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【单选题】For any positive integer n, n>1, the "length" of n is the number of positive primes (not necessarily distinct) whose product is n. For example, the length of 50 is 3 since 50=(2)(5)(5)
Which of the following integers has length 3
A.3
B.15
C.60
D.64
E.105
网考网参考答案:E
网考网解析:

根据题目中的定义可知: (A)的length等于1; (B)的length等于2,因为15=3×5; (C)的length等于4,因为60=2×2×3×5; (D)的length等于6,因为64=2×2×2×2×2×2; (E)的length等于3,因为105=3×5×7。 查看试题解析出处>>

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